7.5" Upper With GPX 7" Rail

7.5″ Upper w/ GPX-7″ Rail System


7.5″ Pistol Upper, w/ 7″ GPX Rail System, M4 Nickel Boron Extension with Phantom Flash Hider.

In stock



  • NITRIDE PREMIUM 7.5″ Pistol Upper w/M4 Nickel Boron Barrel Extension
  • 7.5″ Barrel 4150 CMV  (5.56 NATO Chamber)
  • Nitride Treated Barrel (inside & out)
  • 1:7 Twist Rate
  • 1/2 x28 Thread Pitch
  • Nickel Boron M4 Barrel Extension with Extended Feed Ramps
  • Nitride M16 Bolt Carrier Group w/Logo (properly staked w/Grade 8 hardware)
  • Nitride Gas Tube (Nitride Treated)
  • Nitride Micro Gas Block .750 (Nitride Treated)
  • 7″ GPX Free Floating Rail System
  • Forged Charging Handle
  • Phantom Flash Hider 1/2×28


SOT GPX-7 Rail System:

The SOT (GPX-7)” Rail System has an overall length of 7.2; It’s Enhanced features include a machined one piece billet aluminum extruded rail which is much stronger and more rigid than 2 piece rail systems. The GPX-7 Provides (2) QD  Sling Swivel Attachments Points that are integrated in rear and are machined into both the left and right sides.

Designed to be used in with a (Micro/Low Profile Gas Block) with a (Pistol length gas system)  or (FSB with Carbine length gas system). This rail system gives the user a more ” rigid” way to mount various accessories available to their AR15 platform. See more..


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